€••      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ,/translations/zh_CN/filesystems/ext4/bitmaps”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/zh_TW/filesystems/ext4/bitmaps”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/it_IT/filesystems/ext4/bitmaps”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/ja_JP/filesystems/ext4/bitmaps”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/ko_KR/filesystems/ext4/bitmaps”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/sp_SP/filesystems/ext4/bitmaps”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒcomment”“”)”}”(hŒ SPDX-License-Identifier: GPL-2.0”h]”hŒ SPDX-License-Identifier: GPL-2.0”…””}”hh£sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1h¡hhhžhhŸŒF/var/lib/git/docbuild/linux/Documentation/filesystems/ext4/bitmaps.rst”h KubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒBlock and inode Bitmaps”h]”hŒBlock and inode Bitmaps”…””}”(hh»hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hh¶hžhhŸh³h KubhŒ	paragraph”“”)”}”(hŒMThe data block bitmap tracks the usage of data blocks within the block
group.”h]”hŒMThe data block bitmap tracks the usage of data blocks within the block
group.”…””}”(hhËhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h Khh¶hžhubhÊ)”}”(hŒEThe inode bitmap records which entries in the inode table are in use.”h]”hŒEThe inode bitmap records which entries in the inode table are in use.”…””}”(hhÙhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h K	hh¶hžhubhÊ)”}”(hŒ¬As with most bitmaps, one bit represents the usage status of one data
block or inode table entry. This implies a block group size of 8 *
number_of_bytes_in_a_logical_block.”h]”hŒ¬As with most bitmaps, one bit represents the usage status of one data
block or inode table entry. This implies a block group size of 8 *
number_of_bytes_in_a_logical_block.”…””}”(hhçhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h Khh¶hžhubhÊ)”}”(hXÌ  NOTE: If ``BLOCK_UNINIT`` is set for a given block group, various parts
of the kernel and e2fsprogs code pretends that the block bitmap contains
zeros (i.e. all blocks in the group are free). However, it is not
necessarily the case that no blocks are in use -- if ``meta_bg`` is set,
the bitmaps and group descriptor live inside the group. Unfortunately,
ext2fs_test_block_bitmap2() will return '0' for those locations,
which produces confusing debugfs output.”h]”(hŒ	NOTE: If ”…””}”(hhõhžhhŸNh NubhŒliteral”“”)”}”(hŒ``BLOCK_UNINIT``”h]”hŒBLOCK_UNINIT”…””}”(hhÿhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hýhhõubhŒï is set for a given block group, various parts
of the kernel and e2fsprogs code pretends that the block bitmap contains
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necessarily the case that no blocks are in use -- if ”…””}”(hhõhžhhŸNh Nubhþ)”}”(hŒ``meta_bg``”h]”hŒmeta_bg”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hýhhõubhŒ½ is set,
the bitmaps and group descriptor live inside the group. Unfortunately,
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